VLZ22-GS18 Equivalent & Substitute Parts

Part Overview

The VLZ22-GS18 is a Zener diode rated at 22 V nominal voltage with 500 mW power dissipation, manufactured by Vishay General Semiconductor - Diodes Division. This component is packaged in SOD-80 QuadroMELF surface mount configuration and is qualified to AEC-Q101 automotive standards. The product is currently classified as obsolete, making identification of equivalent and substitute parts essential for ongoing design support, maintenance, and production continuity. Substitute parts must maintain electrical performance specifications while accommodating packaging and availability constraints.

Substiute Parts

VLZ22-GS18

Vishay General Semiconductor - Diodes DivisionIn Stock: 822VLZ22-GS18 Datasheet

Current PartRFQ

TLZ22-GS18

Vishay General Semiconductor - Diodes DivisionIn Stock: 758TLZ22-GS18 Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the VLZ22-GS18 is determined by the following critical parameters:

Electrical Equivalence Criteria:

• Zener voltage: 22 V nominal
• Maximum power dissipation: 500 mW
• Maximum impedance: 30 Ohms
• Forward voltage: 1.5 V maximum at 200 mA
• Operating temperature range: -65°C to 175°C

Mechanical and Packaging Criteria:

• Surface mount technology
• SOD-80 package family compatibility
• Automotive grade qualification (AEC-Q101)
• RoHS3 compliance
• MSL 1 rating

Compliance and Regulatory Criteria:

• REACH unaffected status
• ECCN EAR99 classification
• HTSUS 8541.10.0050 tariff code

The TLZ22-GS18 qualifies as a direct substitute because it maintains all electrical parameters, operates within the same temperature range, meets automotive qualification requirements, and is packaged in the SOD-80 family (MiniMELF variant). The primary difference is packaging format (Tape & Reel versus bulk) and active product status.

Parameter Comparison

Engineering Selection Recommendations

VLZ22-GS18 (Main Part): The VLZ22-GS18 is obsolete and no longer in active production. Existing inventory of 766 pieces is available but represents a finite supply. This part should be used only when existing stock is available and long-term supply is not a requirement.

TLZ22-GS18 (Primary Substitute): The TLZ22-GS18 is the recommended substitute for new designs and ongoing production. This part is active, maintains all electrical specifications, and is supplied in Tape & Reel packaging suitable for automated assembly. The SOD-80 MiniMELF package is mechanically compatible with SOD-80 QuadroMELF footprints in most applications. With 700 pieces in stock, this part provides superior supply continuity. Both parts carry ROHS3 compliance, MSL 1 rating, and automotive-grade qualification.

Packaging Consideration: The transition from QuadroMELF to MiniMELF represents a package family variant within the SOD-80 specification. Both packages are surface mount, lead-free, and suitable for reflow soldering. PCB footprint verification is required to confirm mechanical compatibility in specific applications.

Frequently Asked Questions (FAQ)

Q: Can the TLZ22-GS18 be used as a direct replacement for the VLZ22-GS18?

A: Yes. Both parts share identical electrical specifications: 22 V zener voltage, 500 mW power rating, 30 Ohms maximum impedance, and 1.5 V forward voltage at 200 mA. Operating temperature range, RoHS compliance, and MSL rating are identical. The primary difference is packaging format and product status.

Q: What is the difference between SOD-80 QuadroMELF and SOD-80 MiniMELF?

A: Both are SOD-80 package variants used for surface mount diodes. QuadroMELF and MiniMELF differ in physical dimensions and lead configuration but maintain the same electrical interface. PCB footprint compatibility must be verified for your specific application.

Q: Is the TLZ22-GS18 automotive qualified?

A: The TLZ22-GS18 is classified as automotive grade. AEC-Q101 qualification status is not explicitly specified in the provided data for this part number.

Q: Why is the VLZ22-GS18 obsolete?

A: Product obsolescence is determined by the manufacturer. The VLZ22-GS18 has been discontinued, and the TLZ22-GS18 represents the active equivalent in the Vishay product line.

Q: What is the supply status for these parts?

A: VLZ22-GS18 inventory is limited to 766 pieces. TLZ22-GS18 is actively produced with 700 pieces currently in stock. For long-term production requirements, the TLZ22-GS18 is the appropriate selection.

Q: Are both parts RoHS compliant?

A: Yes. Both the VLZ22-GS18 and TLZ22-GS18 are ROHS3 compliant and carry MSL 1 (unlimited) moisture sensitivity rating.

Q: Can I use these parts interchangeably in existing designs?

A: Electrical substitution is direct. Mechanical substitution requires PCB footprint verification due to package variant differences between QuadroMELF and MiniMELF configurations.